Buffer mechanism for diaphragm face plates



A. E. SMALL BUFFER MECHANISM FOR DIAPHRAGM FACE PLATES Dec.'20, 1927.

Filed June 22. 1926 ELL 7.2

2 I I5 r1140? I Jiuzenfor: igrifiurfl'. 5122311 lliilm Patented Dec.226, 1927.

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ARTHUR a sit/mini or CHICAGO; attracts, 'assreivon so union METALrnonucrs company, or cmcneo r mnors, A coarona'rron oF-nnLAwARn I urner.Maonauxsur FOR DIAPHRAGM FAGEPLATES. Y

F Application filedil'u'ne 22,1926. SerialNo' 117,84 8 I Upper buffermechanisms are used to keep -the' diaphragm face plates ot adjacentpas-.

sefnger'train cars in; contact. under all. service; conditions."Thefaceplate must be per- *mitted =t "move longitudinally, laterallyand/orobliquelyrelative to its normal pos 1'-' 'ti'on onjthe car. Itmust be permitted to move'=laterally'of itself (i. ,e. longitudlnally'0f:the-c'ar-)" to accommodate the draft gear such aj device whichis'simpl'e and economic j to manufacture {andjapply and 'Whl-Clfcan bemovements and must move longitudinally of itself :so that when one carswingsi more th'an its adjacent car thefriction between-the face plateswill not tear eitherrof them" from their attachments. Furthermore. theface plate "must-move obliquely when the cars are moving on ai curvedtrack The face platemay of course, make all of thesemovementsiconsecutively br siinu ltane'ouslyi Vi y invention- I relatesto devices which "yieldingly permitthe face plate to make,

such movements and'which havei a tendency "to return the face plate toits normalp0sitionv and which d 4 return it to such normal "positionwhen permitted to; do so. i

{An :o bject of the lnvent-lonis to provide installed; inspected,krepaired or: 1 replaced *without' enteringthe car or removing any partthereof, not eve'n the diaphragm offlts face plate; Furthermore, "thedevice is noiseless becausejall the parts are under pres fisurecontactment.

r r Fig. 1 shows a: typical ap'plication of my device to a railway cari5 Figs: 2,3, 4 and-'fi'arediagrams'showing the device invarious serviceconditions. 1 i Fig. 6 isa' detailof the'resilient member. "Figs 7 is: adetail of the car end attachfl-FigkSis a-detail ofthe face plate attach--ment." 1

Fig. 9 is a detail of, a modified formot the face plate attachment rV 1. I i Figs/10, 11 12 "and' l 3 areinodified .forms The usual parts ofa railwayupassenger Ttrain car are shown, such'asithe end' wall 1,diaphragm 2, and di'aphragm face plate, 3.

My device comprises two resilient members' t; preferably duplicates,each otwhich ""has 'one end (40) rigidly secured to the car end element1 (or face plate element) and its opposite end '42, pivot-ally securedtothe elusive, under serv ce conditions.-

-si0n forcing the opposite endsoffthe spring 4: shows I V V :mov'ed"longitudinally ;(or=sidewise of 'thef of'the'other spring 5 y shows theface; wherein the springs as the distance between!) and'lO and'll' andvents the pivotal ends-o1 the springs end wall thanthe outer ends(or'b'eyonddead center.) If such a relationof parts shou "middle portionhigherthan the'place ofthe attachment-of the springs to the end wall.

brackets5 which are positionedequi-distant from the center ofthecar'and'the-innerend of each'springis rigidly secured to the face plateby'a device 6 which positioned at the middle ot'the face plates.

. a Fig: l'sho'ws a typical applicationfof'my' device to ara'ilwaycar,while Figs. 2-5, i'nare diagrams showingits action '2-shows'theassociated iparts innorm'al position; while Fig. 3 shows themunder'maxim'um colnprestoward each other or foreshortening it. Fig.

the device when the-faceplate :has

ear); wherein theopp'osite-ends'of one spring 7 are forced toward eachother andth'e ends plate 'movedf obliquely have been foreshortened 12;respectively'is less than when in normal position; as-s'hown inFig.2.Astop'60'preconnectionsbf theQinner g from goingnearer to the an;apexed' diaphragm "face plate with its 8are pulled apart. Fig.

as I ldTeXist the; device would not return to normal po'sition. Z

. j The device may beapplied to a car having The rsilientmember mustbecapable of yieldingly-foreshortening its length and," also be capableof yieldingly increasing its length and then returning toits normal-length'un'-' der either condition by=its-own inherent I power; Figs. 4,10, 11,12' and13 show vari- 'ous types of resilient members which havethiscapacity, Fig. t shows 'a're'ctangular bar'slightly bowed whileFigs. 10 and 12am- -also rectangularbars bent'to form' an Ogee orreverse curve. Figs-13; shows asem'i-elliptic spring witlr the auxiliaryleaveson the {inside of the curvature so as togresist the furtherdeflection.- Fig. 11 shows a member having "a' coil or coils) to resistfurther 'de- The resilient: members; are preferably bowed'or given aninitial deflection to assure that under further 7 stress they will' 5deflect in the desired direction. This is desirable, no matter what kindof spring 1s used. Furthermore, the bow makes an easier acting ment, isdisclosed and specifically claimed in spring by giving it an initialeccentricity. The'spring must not be restricted in its action by contactwith any part of the car, such as the face plate at 1501 16 (or the carif the. springs are bowed the other Way.) In the constructionillustrated the effective ends of the springs adjacent the face platearespaced apart from the face plate sufliciently to permit the spring todeflect under the maximum; service conditions without in-- terferencewith the face plate. The' two bowed springs are interposedbetween thecar end element 1 and the diaphragm face plate" element 3, and broadlyexpressed, the effective end of the spring adjacent the element towardwhich the spring is bowed must be spaced apart from that element toassure clearance for theproper action of the bowed spring. The effectiveend (20) is that portion of the spring where the deflectionstarts and isnot necessarily its extremity.

The pivoted attachment, with the abutapplicationfor patent, Serial No.117,847, June 22, v1926. Briefly, however, the

I bracket 5 has oppositely disposed perforated walls 22-23 and theresilient member- 4 is formed with an eye 25 at the pivoted end 1 and abolt 24passes through the perforations Qland the eyes sufficientlylarger permit the member The .size of the eye being than the size of thebolt to to engage the abutment when under stress. Fig. 9 shows a brackethaving elongated. perforations 21 which couldbe used to assure'the endof the spring engaging the abutment, and, furthermore,- to

permit the spring'8to move a certain distance before-stressed, or anelongated eye could be used on'the spring for the same purpose.

There are certain advantages obtained by rigidly. attaching one end ofsuch a resilient member to its adjacent car part, one of which is to;put a lateral stress (in addition to the longitudinal stress) upon theresilient member, thereby increasing the forces in the spring tending toreturnit to its normal position. Thisis especially true when the faceplate is in .an oblique position.

In the form illustrated the resilient member t'is attached to the faceplate 3 by a de-.

vice 6 having oppositely disposed perforated walls and also a verticalabutment 52 and a retaining wall 53 (shown as semi-circular.)

The resilient member, 4 is formed at this end with a lateral auxiliaryextension 54, which in assembled position, owing to an initialcompression of the spring, bears against the abutment 52'. The bolt 24'passes through the perforationsholdingthe spring between it and theretaining-wall 53. When the face plate moves toward the car the angle 55between the main portionof the. spring and its lateral extension 5 lisdecreased, thus causing a force which tends to deflect the spring inaddition toits foresho'rtening. It is preferable to providea'curvedconnection 56 between themain portion and the lateral portion of thespring to reduce breakages at this point. This springis made so thatupon assembly it is necessary to slightly decrease the angular relationbetween the main and auxiliary part of the spring. When the face platemoves toward theside of the car (see Fig. 4) the angular relation 55 ofthese parts is decreased on I creased on the right spring 8. Whentheface plate assumes anoblique-position (see the left spring 7 and in-'i i Fig. 5) this angular relationis increasedon the right spring 57 anddecreasedon the left spring 58' (or vice versa.) Any changing of thisangular relation tends toreturn: the

sarytoslightly shorten their length (by. de

fleeting them) in order to install them which causes the parts to beinpressure contact. This prevents rattling andnoise which is desirablein sle'eping'carsand when the par- .ticular device is on the 'rear endof the last car, or when'the car is coupled to a car not equippedwith aface plate.

'Ic'laim':

1. In a railway car; the combination of an I end wall element, adiaphragm; face plate element, and two resilient members, each of saidmembers havingone of its ends rigidly secured to one of said elementsand its opposite end pivotally secured to the o'therof said element-s. I,;5 2. In a railway car; the combination 'of an end wall, a diaphragmface plate, and two resilient members, each of said members having itsinner end rigidlysecured to the'said face plate and its outer endpivotally secured to the said end'wall. 1 T

3. In a railway car; the combination of an end wall element, a diaphragmfaceplate element, and two bowed spring members, each of saidmembersxhavingone of its ends rigidly secured to one of-saidelements,'and its opposite end pivotally secured to the I other of saidelements.

4. Inan upper buffer IIIQChEL-IHSID. for rail way passenger train cars,a connection between a resilient member and a part of the car, saidconnection comprising a bracket an end Wall, a diaphragm face plate, twoitsadjacent bracket. spaced apart brackets secured to the end having anabutment, a resilient member hav- Wall, a bracket secured to the middleof the ing a lateral extension engaging said abutface plate, and tworesilient members, each ment, and removable means to retain, the end ofeach member attached to one of said 10 parts in said positi0n. brackets,one end ofeach member having a' 5. In a railway car; the combination oflateral extension engaging an abutment on- ARTHUR E; SMALL;

